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Google: “Google News Timeline can present results from lots of different sources, including both recent and archival news, scanned newspapers and magazines, blog posts, and sports scores and media like music and movies. You can view multiple sources simultaneously, allowing each source to lend context to the others.”

TC: “The timeline view gives you a snapshot of the major stories for each day, and you can drag the dates across to go back in time. It seems to favor Time Magazineand Wikipedia Events, although you can get rid of those results with a click. If you want to zero in on a particular topic, you can search for that term to see how a story has evolved over time. The timeline remembers your searches and saves them if you are logged in.”

SEL: “Google News Timeline is what it sounds like – a tool that lets you see news coverage over a period of time. … But it’s also more than a simple news timeline, because Google has added a number of user controls that lets you customize the tool in several different ways.“